package com.ruoyi.framework.web.service;

import cn.dev33.satoken.stp.StpUtil;
import com.ruoyi.common.enums.UserStatus;
import com.ruoyi.common.exception.base.BaseException;
import com.ruoyi.common.exception.user.*;
import com.ruoyi.common.utils.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import com.ruoyi.common.constant.CacheConstants;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.constant.UserConstants;
import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.common.core.domain.model.LoginUser;
import com.ruoyi.common.core.redis.RedisCache;
import com.ruoyi.common.utils.ip.IpUtils;
import com.ruoyi.framework.manager.AsyncManager;
import com.ruoyi.framework.manager.factory.AsyncFactory;
import com.ruoyi.common.service.system.ISysConfigService;
import com.ruoyi.common.service.system.ISysUserService;

import java.util.*;


/**
 * 登录校验方法
 *
 * @author ruoyi
 */
@Component
public class SysLoginService {

    @Autowired
    private RedisCache redisCache;

    @Autowired
    private ISysUserService userService;

    @Autowired
    private ISysConfigService configService;


    @Autowired
    private SysPermissionService permissionService;


    /**
     * 登录验证
     *
     * @param username 用户名
     * @param password 密码
     * @param code     验证码
     * @param uuid     唯一标识
     * @return 结果
     */
    public String login(String username, String password, String code, String uuid) {
        // 登录前置校验
        loginPreCheck(username, password);

        // sa-token 用户验证
        LoginUser loginUser;
        try {
            //校验账号和密码
            loginUser = checkLogin(username, password);
            //登录
            StpUtil.login(loginUser.getUser().getUserId());
        } catch (Exception e) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, e.getMessage()));
            throw new CustomException(e.getMessage());
        }
        //成功
        AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_SUCCESS, MessageUtils.message("user.login.success")));
        recordLoginInfo(loginUser.getUserId());

        //缓存到session
        StpUtil.getSession().set("user", loginUser);

        //获取 Token  相关参数
        return StpUtil.getTokenValue();
    }


    public LoginUser checkLogin(String username, String password) {
        SysUser user = userService.selectUserByUserName(username);
        if (StringUtils.isNull(user)) {
            throw new CustomException("登录用户：" + username + " 不存在");
        }
        if (!SaTokenUtils.matchesPassword(password, user.getPassword())) {
            throw new CustomException("密码错误！");
        } else if (UserStatus.DELETED.getCode().equals(user.getDelFlag())) {
            throw new BaseException("对不起，您的账号：" + username + " 已被删除");
        } else if (UserStatus.DISABLE.getCode().equals(user.getStatus())) {
            throw new BaseException("对不起，您的账号：" + username + " 已停用");
        }
        return createLoginUser(user);
    }

    private LoginUser createLoginUser(SysUser user) {
        LoginUser loginUser = new LoginUser(user, permissionService.getMenuPermission(user));
        loginUser.setLoginTime(new Date().getTime());
        loginUser.setUserId(user.getUserId());
        loginUser.setToken(StpUtil.getTokenValue());
        return loginUser;
    }

    /**
     * 校验验证码
     *
     * @param username 用户名
     * @param code     验证码
     * @param uuid     唯一标识
     * @return 结果
     */
    public void validateCaptcha(String username, String code, String uuid) {
        boolean captchaEnabled = configService.selectCaptchaEnabled();
        if (captchaEnabled) {
            String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + StringUtils.nvl(uuid, "");
            String captcha = redisCache.getCacheObject(verifyKey);
            redisCache.deleteObject(verifyKey);
            if (captcha == null) {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.jcaptcha.expire")));
                throw new CaptchaExpireException();
            }
            if (!code.equalsIgnoreCase(captcha)) {
                AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.jcaptcha.error")));
                throw new CaptchaException();
            }
        }
    }

    /**
     * 登录前置校验
     *
     * @param username 用户名
     * @param password 用户密码
     */
    public void loginPreCheck(String username, String password) {
        // 用户名或密码为空 错误
        if (StringUtils.isEmpty(username) || StringUtils.isEmpty(password)) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("not.null")));
            throw new UserNotExistsException();
        }
        // 密码如果不在指定范围内 错误
        if (password.length() < UserConstants.PASSWORD_MIN_LENGTH
                || password.length() > UserConstants.PASSWORD_MAX_LENGTH) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
            throw new UserPasswordNotMatchException();
        }
        // 用户名不在指定范围内 错误
        if (username.length() < UserConstants.USERNAME_MIN_LENGTH
                || username.length() > UserConstants.USERNAME_MAX_LENGTH) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));
            throw new UserPasswordNotMatchException();
        }
        // IP黑名单校验
        String blackStr = configService.selectConfigByKey("sys.login.blackIPList");
        if (IpUtils.isMatchedIp(blackStr, IpUtils.getIpAddr())) {
            AsyncManager.me().execute(AsyncFactory.recordLogininfor(username, Constants.LOGIN_FAIL, MessageUtils.message("login.blocked")));
            throw new BlackListException();
        }
    }

    /**
     * 记录登录信息
     *
     * @param userId 用户ID
     */
    public void recordLoginInfo(Long userId) {
        SysUser sysUser = new SysUser();
        sysUser.setUserId(userId);
        sysUser.setLoginIp(IpUtils.getIpAddr());
        sysUser.setLoginDate(DateUtils.getNowDate());
        userService.updateUserProfile(sysUser);
    }
}
